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2.01 Unit 2 Asynchronous Lesson 25-26
By Elizabeth Winer
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Question 33
33.
Reflection: Answer as many as you like (at least 1).
What is something new you learned?
What is something that suprised you?
What questions do you have?
What would you like to learn more about?
Question 1
1.
Question 2
2.
Question 3
3.
Question 4
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Question 5
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Question 6
6.
Question 7
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Question 8
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Question 9
9.
Hot water is __________ dense than cold water
Question 10
10.
Question 11
11.
Salt water is __________ dense than fresh water.
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12.
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14.
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17.
Question 18
18.
Question 19
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Question 20
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Question 21
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Question 22
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Question 24
24.
The ocean has become __________ more acidic since the Industrial Revolution
Question 25
25.
Question 26
26.
Question 27
27.
Question 28
28.
Question 29
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Question 30
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Question 31
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Question 32
32.
What are salts primarily made of?
Isotopes
Neutral particles
Positively- and negatively-charged particles (ions)
What happens to salt when it is dissolved in water?
It stays solid
It is separated into ions
It breaks apart the water molecules
What term describes the concentration of ions in water?
Density
Temperature
Salinity
Why do ions increase the density of seawater at the poles?
They evaporate quickly
They change the temperature of the water
They are left behind when seawater freezes
What happens when the dense, ion-rich water sinks at the poles?
The water circumnavigates the pole
The ions sink to the ocean floor
It pulls warmer, less dense, ion-poor water from the equator
How do changes in ion concentration at the poles affect ocean currents?
They only affect the temperature of the water
They could stop the ocean’s water exchange
They have no effect on ocean currents
How much of the Earth is covered by oceans?
One third (1/3)
Half (1/2)
Two thirds (2/3)
What primarily controls surface currents?
Temperature
Gravity
Wind
What happens when cold water is mixed into warm water?
Warm water sinks to the bottom
Cold water sinks to the bottom
Cold water rises to the top
What happens when salt water is mixed into fresh water?
Fresh water sinks to the bottom
Salt water sinks to the bottom
Salt water rises to the top
Which
TWO
factors influence thermohaline circulation?
pressure
temperature
saltiness
What occurs in the North Atlantic Ocean near Greenland?
Cold, salty water sinks to the ocean floor
Cold, fresh water rises to the surface
Warm, fresh water sinks to the ocean floor
Which ocean current is known for warming Western Europe?
Gulf stream
Jet stream
North Atlantic Current
Why is London, England warmer than Calgary, Canada?
They are different lattitudes
The uneven heating of the Earth
Warmth from the Gulf Stream
What happens to ocean water when ice melts in Greenland?
It becomes fresher and less dense
It becomes saltier and more dense
It becomes saltier and less dense
How would the global ocean conveyor belt be affected by melting ice in Greenland?
Speed up
Slow down
No change
The slow down of the global ocean conveyor belt
would not
affect climate around the world.
True
False
What percentage of CO2 emitted by humans has been absorbed by the ocean?
50%
75%
25%
What happens to sea creatures like clams and coral as the ocean warms?
Their shells become weaker
Their shells become stronger
Their shells become larger
What is the impact of more hydrogen ions in the ocean?
It helps sea creatures grow better
It competes with shells for carbonate
It reduces ocean acidity
How does ocean acidification affect the food chain?
It has no effect on the food chain
It strengthens the food chain
It threatens the foundation of the food chain
What causes coral bleaching?
Increasing salinity
Decreasing temperature
Increasing temperature
How do corals lose their color during bleaching?
They have too much carbonate
They gain too much algae
They expel their algae
What happens to bleached corals if conditions improve?
They grow larger
They can be recolonized by algae
They die immediately
What do trade winds normally do?
Push cold surface waters towards Asia
Push warm surface waters towards Asia
Push warm surface waters towards South America
What happens during El Niño?
Trade winds weaken and warm surface water moves eastward
Trade winds weaken and cold surface water moves eastward
Trade winds strengthen and cold surface water moves eastward
What conditions does the Pacific Northwest experience during an El Niño
?
colder, drier
warmer, wetter
warmer, drier
What happens during La Niña?
Trade winds strengthen and cold surface water moves eastward
Trade winds strengthen and warm surface water moves eastward
Trade winds weaken and cold surface water moves eastward
What conditions does the Pacific Northwest experience during a La Niña
?
Colder, wetter
Warmer, wetter
Colder, drier